21103520

素因数分解:

$2^5\times 5^1\times {\mathrm{41}}^1\times {\mathrm{3217}}^1$

素因数の和:3273

約数の個数: 48

約数和(自身を含む): 51088968

約数和(自身を除く): 29985448

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 80, 82, 160, 164, 205, 328, 410, 656, 820, 1312, 1640, 3217, 3280, 6434, 6560, 12868, 16085, 25736, 32170, 51472, 64340, 102944, 128680, 131897, 257360, 263794, 514720, 527588, 659485, 1055176, 1318970, 2110352, 2637940, 4220704, 5275880, 10551760, 21103520]

約数ペア:

[(1, 21103520), (2, 10551760), (4, 5275880), (5, 4220704), (8, 2637940), (10, 2110352), (16, 1318970), (20, 1055176), (32, 659485), (40, 527588), (41, 514720), (80, 263794), (82, 257360), (160, 131897), (164, 128680), (205, 102944), (328, 64340), (410, 51472), (656, 32170), (820, 25736), (1312, 16085), (1640, 12868), (3217, 6560), (3280, 6434)]